Got to have some additional help/reference on RPM's since they have sort of taken over my life in the last few months. I know Wexler has a book (limited since it only goes through 1939), CONECA has two E-Books by Wiles ($68.00 for both) and Wiles has a attribution and pricing guide ($199.00). Are there others? It seems to me that the CONECA E-Books are the way to go. Any thoughts, opinions from you experts out there? Thanks!